MCP4728 Quad 12-Bit DAC with EEPROM – STEMMA QT / Qwiic Compatible

Product Description
The MCP4728 is a versatile quad-channel 12-bit digital-to-analog converter (DAC) with built-in EEPROM, allowing all four output voltages to be saved and automatically restored on power-up. This makes it ideal for applications where stable, predefined analog voltages are required immediately after startup.

Each of the four DAC channels can be independently controlled over the I2C interface, and the device supports both external supply reference (VDD) and an internal 2.048V reference with selectable gain. This flexibility allows output ranges suitable for both 3.3V and 5V systems.

The module integrates all required support components and includes a STEMMA QT / Qwiic compatible JST-SH connector, enabling plug-and-play, solder-free connection to Arduino, Raspberry Pi, ESP32, STM32, and other I2C-capable controllers.

Key Features

• Four independent 12-bit DAC outputs in a single IC

• Non-volatile EEPROM stores DAC values and I2C address bits

• Power-up recall of stored output voltages

• Internal 2.048V reference or external VDD reference selectable

• Gain options for flexible output voltage scaling

• I2C interface with fixed default address

• STEMMA QT / Qwiic connector for easy wiring

• Compatible with 3.3V and 5V logic systems

Technical Specifications

• DAC Resolution: 12-bit

• Number of Channels: 4 (buffered outputs)

• Interface: I2C

• Default I2C Address: 0x60

• Supply Voltage: 2.7V – 5.5V

Output Voltage Ranges

• Using Internal VREF (2.048V):

  • Gain = 1 → 0.000V to 2.048V

  • Gain = 2 → 0.000V to 4.096V

• Using External VREF (VDD):

  • 0.000V to VDD

• Differential Nonlinearity (DNL): ±0.2 LSB (typical)

• Settling Time: 6 µs (typical)

Typical Applications

• Multi-channel analog signal generation

• Bias voltage and reference generation

• Audio control and waveform synthesis

• Programmable power supplies

• Calibration and test equipment

• Robotics and industrial control systems

Package Contents

• 1 × MCP4728 Quad DAC Module

• Pin header (not soldered)